LI-8100 System Specifications
Design and operational
specifications for LI-8100 System parts and accessories can be viewed
below. Use the tabs to view specifications for the LI-8100 Analyzer Control
Unit, survey and long-term chambers, as well as the LI-8150 Multiplexer.
Analyzer
Control Unit |
PDA Requirements:
With serial cable: PDA running
Palm® OS 3.51 or higher.
Wireless: PDA running Palm® OS
4.1 or higher, and supporting 802.11b wireless
connectivity.
Memory: 18 MB on-board flash memory
for data collection (32 MB total)
Compact Flash: Type I industrial
grade, 1 GB with adapter sleeve included, will accept
Type II with appropriate adapter sleeve.
Wireless PC Card: Fixed wireless
networking Type II PC Card. Cisco Systems Aironet® 350
Series 11 Mbps DSSS for Wi-Fi (802.11b) networking
RS-232
Signal output rate: 1 Hz
Baud rate: 57,600 bps
Pressure Sensor:
Measurement Range: 15-115 kPA
Accuracy: 1.5% over 0 to 85 °C
Maximum Gas Flow Rate: 1.7 liters/min |
 Power Requirements:
Auxiliary Input Voltage:
10.5-28
VDC
Battery Input Voltage:
10.5-15
VDC
3A @ 12V (36W) maximum during warm-up with heaters
on
1A @ 12V (12W) average after warm-up with heaters
on
Operating Range:
Temperature: –20 °C to
45 °C
Relative Humidity: 0 to 95%
RH, Non-Condensing
Weatherproof Rating: Tested to IEC
IP55 standard
Dimensions: 29 cm L x 38.1 cm W x
16.5 cm H
(11.4" x 15" x 6.5")
Weight: 5.3 kg (11.8 lb.) without
battery;
6.7 kg (14.8 lb.) with battery
Battery Weight: 1.4 kg (3.0 lb.) |
Infrared
Gas Analyzer
Measurement Principle: Non-Dispersive
Infrared
Traceability: Traceable to WMO standards
for CO2.
NIST traceable LI-610 Portable Dew Point Generator
for H2O
CO2
Measurement Range: 0-3000 ppm
Accuracy: 1.5% of reading
Calibration Drift:
Drift at 0 ppm: <0.15 ppm/°C
Span Drift1: < 0.03 %/°C
Total Drift at 370 ppm: <0.4
ppm/°C
RMS Noise at 370 ppm with 1 sec signal averaging: <1
ppm
Sensitivity to water vapor: < 0.1
ppm CO2/mmol/mol
H2O
H2O
Measurement Range: 0-80 mmol/mol
Accuracy: 1.5% of reading
Calibration Drift:
Drift at 0 ppt: <0.003 mmol/mol/°C
Span Drift1: <0.03 %/°C
Total Drift at 10 ppt: <0.009
mmol/mol/°C
RMS Noise at 10 ppt with 1 sec signal averaging: <0.01
mmol/mol
Sensitivity to CO2 <0.0001
mmol/mol H2O/ppm
CO2 |
Auxiliary
Sensor Interface
Dimensions: 10.2 cm L x 3.8 cm
W x 6.4 cm H (4" x 1.5" x 2.5")
Inputs:
4 Thermocouple channels (Type E, J, or T)
4 General input channels (0-5 VDC)
Power Out: 0-5 VDC
Power In: 10.5-28 VDC
Connections: Terminal strip with
screw posts |
Accessories
Soil Temperature Probe (Type E): 6.4
mm (0.25") dia., 250 mm (10") immersion
length
Soil Temperature Thermistor:
6 foot cable accuracy: ± 1.0 °C
from –20 to 50 °C
Soil Moisture Probe (ECH2O
Model EC-5): 5 cm (2") length
Soil Moisture Probe (Theta Probe Model ML2) |
8100-102
Survey Chamber (10 cm)
System Volume: 854.2 cm3
Soil Area Exposed: 83.7 cm2 (13
in.2)
Dimensions: 15.2 cm L x 15.2 cm W
x 25.4 cm H (6" x 6 " x 10")
Air temperature thermistor:
Operating Range: –20 to
45 °C
Accuracy: ± 0.5 °C
over 0-70 °C
Cable length: 1.01 m (40")
Weight: 1.6 kg (3.5 lb.) |
 |
8100-103
Survey Chamber (20 cm)
System Volume: 4843 cm3
Soil Area Exposed: 317.8 cm2 (49.3
in.2)
Dimensions: 28.7 cm L x 28.7 cm W
x 29.2 cm H (11.3" x 11.3" x 11.5")
Air temperature thermistor:
Operating Range: –20 to
45 °C
Accuracy: ± 0.5 °C
over 0-70 °C
Cable length: 1.01 m (40")
Weight: 2.9 kg (6.4 lb.) |
 |
Accessories
Soil Temperature Probe (Type E): 6.4
mm (0.25") dia., 250 mm (10") immersion
length
Soil Moisture Probe (ECH2O
Model EC-5): 5 cm (2") length
Soil Moisture Probe (Theta Probe Model ML2) |
|
LI-COR offers two long-term chambers (8100-101, 8100-104)
to make unattended measurements of diel and seasonal soil
CO2 flux
patterns. These chambers attach to either the LI-8100 (direct
connection), or to the LI-8150 Multiplexer. Both chambers
have undergone extensive testing throughout the development
cycle to address the impacts of chamber design on CO2 efflux
from the soil.
Long-Term
Chambers - 8100-101, 8100-104
- Unattended measurements for weeks or months at a time
- Vertical or horizontal chamber drive mechanism (allows
exposure of measurement area to natural microclimate)
- Perforated baseplate (minimizes soil perturbations around
measurement area)
- Double gasket system to prevent leaks
|
|
8100-101 Long-Term Chamber
The
8100-101 Long-Term Chamber is designed for use with
the LI-8100 in a single chamber, long-term system.
The 8100-101 also can be used for multiplexing with
the LI-8150 Multiplexer. The chamber has a vertical
lift strut mechanism (below) to raise and lower the
chamber. |
8100-104 Long-Term Chamber
Designed for use with the LI-8150 Multiplexer, the
8100-104 Long-Term Chamber is an economical, lightweight
solution for multiplexed systems. The 8100-104 expands
the capabilities of the LI-8100 System and provides
an additional chamber option to measure both spatial
and temporal variation of soil CO2 flux.
The chamber has a lift-and-rotate drive mechanism
(below right) that rotates the chamber to six configurable
open positions.
|
(2 1/2 minutes)
Although
the long-term chambers are identical to one another
in terms of the measurement protocols they follow,
there are some key operational differences to consider,
particularly when using the chambers in a multiplexed
system: |
|
|
- 8100-101 Long-Term
Chamber uses a strut mechanism that opens and
closes the chamber in a 180° vertical arc.
- 8100-101 comes with
2 m cable/hose assembly attached.
- When used with the
LI-8150 Multiplexer, the 8100-101 requires a separate
Chamber Sensor Interface (one per chamber) for
connecting auxiliary sensors.
|
- 8100-104 Long-Term
Chamber uses a lift-and-rotate drive mechanism
that opens the chamber up slightly and then around
horizontally to any of six open positions.
- 8100-104 requires choice
of 2 m or 15 m cable/hose assembly.
- Auxiliary Sensor inputs
are integrated into chamber for use in a multiplexed
system.
|
Chamber
Sensor Interface
 In
a multiplexed system with 8100-101 chambers,
an 8150-661 Chamber Sensor Interface is required
for each chamber where auxiliary sensors are
to be connected. The Interface allows for connection
of up to three auxiliary sensors, such as soil
temperature and moisture sensors offered by LI-COR.
The sealed inputs on the Interface each provide
a DC excitation source and a 0-5VDC general input
channel.
|
Built-in
Sensor Inputs
 In
a multiplexed system with 8100-104 chambers,
auxiliary sensors are connected directly to the
control panel of the chamber. The panel inputs
allow for connection of up to three auxiliary
sensors, such as soil temperature and moisture
sensors offered by LI-COR. The sealed inputs
each provide a DC excitation source and a 0-5VDC
general input channel.
|
 
LI-8150
Multiplexer
|
|
Dimensions: 40.6 cm L x 57.2 cm
W x 21.1 cm H (16" x 22.5" x 8.3")
Weatherproof Rating: Tested to IEC
IP55 standard
Weight:
8 port version: 9.4 kg (20.7
lb)
16 port version: 11.2 kg (24.8
lb)
Operating Range:
Temperature: –20 to 45 °C
Humidity: 0 to 95% RH, non-condensing
Coverage Area:
Max. radius from LI-8150 to chambers: 15.0
m (49.2 ft.)
Max. diameter of measurement circle: 30.0
m (98.4 ft.)
|
Plumbing:
Flow rate to/from chambers: 2-5 lpm (user adjustable)
Flow rate between LI-8100 and LI-8150: 1.7 lpm Pump
in the LI-8100 sub-samples air stream in the LI-8150.
LI-8150 Pump Type: Rotary-vane (non-pulsating flow)
Display:
Four LED Indicators: Power, Check Error Log, Manual
Chamber Activation Indicator, Active Chamber Error
Five 7-segment LED Displays: Active Chamber, Active
Valve, three voltage channel indicators
Power Requirements:
10.5-14.5 VDC (120 VAC and 240 VAC with optional power
supply)
Power supplied through the LI-8150; LI-8150 powers
the LI-8100 when connected
See table below for total system power requirements |
LI-8100 + LI-8150 + (n)
Chambers |
Sampling: No Chamber
Movement |
Sampling: Two chambers
move at one time |
Warm-up: Up to four chambers
move at one time |
(n) |
Amps @ 12.5VDC |
Watts |
Amps @ 12.5VDC* |
Watts |
Amps @ 12.5 VDC* |
Watts |
1 |
1.0 |
12.5 |
3.0 |
37.5 |
3.0 |
37.5 |
2 |
2.0 |
25.0 |
3.8 |
47.5 |
3.8 |
47.5 |
4 |
2.1 |
26.3 |
3.8 |
47.5 |
4.8 |
60 |
8 |
2.1 |
26.3 |
3.8 |
47.5 |
4.8 |
60 |
16 |
2.3 |
28.8 |
3.8 |
47.5 |
4.8 |
60 |
|
Chamber Sensor Interface
(For use with
each 8100-101 long-term chamber in a multiplexed system)
Dimensions: 10.2 cm L x 3.8 cm W x 6.4 cm H (4" x
1.5" x 2.5")
Inputs: 3 general input channels (0-5 VDC)
Power supply (external or from LI-8150): 3 general
input channels (0-5 VDC)
Constant or switched: 0-5 VDC
Unregulated: 12 VDC (12-13.5 VDC typically)
Connections: Weatherproof connectors
|
8150-770
AC Power Supply
Power Requirements: 115-120VAC or 230-240VAC, 50/60
Hz, 230W. Input voltage range is switch-selectable
and must be configured before applying power. Fuses
located inside box cover.
Weatherproof Rating: Tested to IEC IP55 standard
Output Voltage: 12VDC
Operating Temperature Range: –20 to 50 °C
(–4 to 122 °F)
Environmental Operating Conditions: Tested to IP55
for dust and water ingress.
Dimensions: 18.1 cm D x 28 cm L x 10.2 cm H (7.125" x
11" x 4")
Weight: 3.1 kg (14.05 lbs.) |
| |
Accessories
Soil temperature thermistor:
6 foot cable accuracy: ± 1.0 °C from –20
to 50 °C
Cable/hose extension assembly:
Length: 15 m
Connections:
Electrical cables: Turck weatherproof connectors
Air hoses: Quick-connect fittings |
|
